Tvheadend

No response

Andreas,

Is there any way that I can request that you re-open this bug? I just recorded a movie from a major network (the NBC affiliate here in Los Angeles) and because of this issue, no audio was recorded. I turned on the "Write full DVB mux to disk" option and got a number of files in the muxdump directory, many of which are under 1 MB, but some are quite big (46 MB and 152 MB for about a minute of runtime). Will any of them do? I'm going to attach one of the small ones, but if you need one of the bigger ones, I can upload it somewhere.

Thanks for your (re-)consideration,

Alan

OK, let's try again. I hope this is a file you can use. I generated this using azap to tune the receiver, then doing a simple "cat /dev/dvb/adapter0/dvr0 > /tmp/mpeg2audio.ts" to generate the file.

mediainfo shows the following information about the file. As you can see, it's showing the audio as "AC-3", not "mpeg2audio" as tvheadend shows. Not sure why that is, but I verified that what's in the file is the audio and video of the channel in question (4-4 here in Los Angeles).

zbox:/usr/local/bin> mediainfo /tmp/mpeg2audio.ts
General
Complete name : /tmp/mpeg2audio.ts
Format : MPEG-TS
Format profile : No PAT/PMT
File size : 5.34 MiB
Duration : 10s 560ms
Overall bit rate : 4 245 Kbps

Video
ID : 81 (0x51)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Duration @ : 9s 943ms
Bit rate mode : Variable
Bit rate : 3 841 Kbps
Nominal bit rate : 15.0 Mbps
Width : 704 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.379
Stream size : 4.55 MiB (85%)

Audio
ID : 84 (0x54)
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Duration : 10s 560ms
Bit rate mode : Constant
Bit rate : 192 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Delay relative to video : -13ms
Stream size : 248 KiB (5%)

Here's the output of tvheadend of a recording done just after the above completed:

May 17 18:06:39 dvr: Cycling.2011-05-17 from adapter: "LG Electronics LGDT3303 VSB/QAM Frontend", network: "", mux: "605,028 kHz", provider: "", service: "USN "
May 17 18:06:39 dvr: # type lang resolution samplerate channels
May 17 18:06:39 dvr: 1 MPEG2VIDEO 704 x 480
May 17 18:06:39 dvr: 2 MPEG2AUDIO eng 96000 0
May 17 18:07:00 subscription: "DVR: Cycling" unsubscribing from "USN"
May 17 18:07:00 dvr: Recording completed: "/mnt/disk2/pvr/Cycling/Cycling.2011-05-17-2.mkv"
May 17 18:07:00 dvr: "Cycling" on "USN": End of program: Aborted by user@

For comparison, here's the mediainfo output of the output file. As you can see, there's no audio channel:

oot@zbox:/mnt/disk2/pvr/Cycling# mediainfo Cycling.2011-05-17-2.mkv
General
Unique ID : 207896094811066848398897286177294689105 (0x9C6754D8B690980DBE8A2AEFDCFCA351)
Complete name : Cycling.2011-05-17-2.mkv
Format : Matroska
File size : 10.9 MiB
Duration : 26s 92ms
Overall bit rate : 3 508 Kbps
Movie name : Cycling
Writing application : HTS Tvheadend 2.12
Writing library : HTS Tvheadend Matroska muxer

Video
ID : 1
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Codec ID : V_MPEG2
Codec ID/Info : MPEG 1 or 2 Video
Duration : 26s 93ms
Bit rate mode : Variable
Bit rate : 3 438 Kbps
Nominal bit rate : 15.0 Mbps
Width : 704 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.339
Stream size : 10.7 MiB (98%)
Language : English

Closing this because its old and several MKV related fixes have been made since v2.12.